export const getQueryString = (name: string) => {
  if (typeof URLSearchParams !== "undefined") {
    const params = new URLSearchParams(window.location.search);
    return params.get(name);
  } else {
    const reg = new RegExp(`(^|&)${name}=([^&]*)(&|$)`);
    const r = window.location.search.substr(1).match(reg);
    if (r != null) {
      return decodeURIComponent(r[2]);
    }
    return null;
  }
};
